| Castellbisbal to Opwijk | 664.00 mi (1,068.61 km) |
| Castellbisbal to Ostend | 675.06 mi (1,086.41 km) |
| Castellbisbal to Oud-Heverlee | 659.00 mi (1,060.56 km) |
| Castellbisbal to Oud-Turnhout | 694.60 mi (1,117.85 km) |
| Castellbisbal to Oudenaarde | 652.20 mi (1,049.61 km) |
| Castellbisbal to Oudenburg | 672.40 mi (1,082.12 km) |
| Castellbisbal to Oupeye | 661.31 mi (1,064.27 km) |
| Castellbisbal to Overijse | 654.42 mi (1,053.18 km) |
| Castellbisbal to Overpelt | 692.41 mi (1,114.33 km) |
| Castellbisbal to Paal | 677.89 mi (1,090.95 km) |
| Castellbisbal to Peer | 687.23 mi (1,105.99 km) |
| Castellbisbal to Pepinster | 654.21 mi (1,052.85 km) |
| Castellbisbal to Peruwelz | 629.27 mi (1,012.72 km) |
| Castellbisbal to Perwez | 646.33 mi (1,040.16 km) |
| Castellbisbal to Philippeville | 615.16 mi (990.01 km) |
